In my marine setup, I have 2 AC chargers. One is the original legacy charger that charges the lead acid starting bank and the other is a new charger (not victron) which supports and charges the Lithium house bank (with internal BMS). I need to charge the Lithium bank from the alternators and am planning to use the Orion XS to do so. However, I need to prevent the AC-DC and DC-DC from charging simultaneously as it will exceed the recommended charging rate. What is the recommended method to ensure the chargers are not charging simultaneously? So far I've come up with 3 potential paths but need help determining what is the best way to move forward.
A) I found the "Inverting remote on-off cable" but if that's a viable solution, I need help determining how to wire it in (I'm lost in the "pull up" and "pull down" nomenclature). It's not clear if this is compatible for my application with the Orion XS
B) Signal line Relay - I'm trying to avoid a relay.
C) (Not sure if this is possible), setup the voltage profile of the Orion XS such that it will effectively be a slave if the other charger is active, but will still charge the batteries fully (or nearly full)? How would I set this properly so that the 40 amp capacity of the Orion is not additive to the 60 amp capacity of the AC charger.
D) Utilize battery isolators and high current relays to isolate the alternators from the AC charger.
